Coherent stepped-frequency waveform generation based on recirculating microwave photonic frequency conversion

被引：3
|
作者：
Ma, Cong [1 ]
Wang, Xiangchuan [1 ]
Yang, Yue [1 ]
Ding, Zeyong [1 ]
Pan, Shilong [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Natl Key Lab Microwave Photon, Nanjing 210016, Peoples R China
来源：
OPTICS LETTERS | 2023年 / 48卷 / 19期
基金：
中国国家自然科学基金;
关键词：
SIGNALS;
D O I：
10.1364/OL.498303
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a novel method for generating coherent and wideband stepped-frequency waveforms using recirculating microwave photonic frequency conversion (MWP-FC). By injecting a narrowband signal into an MWP-FC loop utilizing a dual-parallel Mach-Zehnder modulator (DPMZM), the signal frequency is continuously converted to produce a stepped-frequency waveform with a wide bandwidth. Within the MWP-FC loop, photo-electric conversion is achieved based on self-mixing detection, where the optical phase noise can be suppressed, guaranteeing stability and coherence of the generated signal. In a proof-of-concept experiment, a stepped-frequency signal with a frequency interval of 2 GHz and a bandwidth of about 16 GHz and a stepped-frequency chirp signal with a frequency interval of 3 GHz and a bandwidth of about 15 GHz are generated. In addition, coherence of the generated signals is verified by coherent integration and de-chirping. (c) 2023 Optica Publishing Group
引用
收藏
页码：4985 / 4988
页数：4
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